Honestly I've still been waiting for foreign language songs to hit either platform for ages. Of course Rock Band Japan/Asia has been cancelled or whatever, but there's no reason why some dudes can't just cheaply put their songs up on the network and hope for the best.
2 French, 2 German, 1 Spanish and 1 Italian song...
Platero y Tú - Hay poco Rock & Roll
Finley - Tutto e Possibile
Die Toten Hosen - Hier Kommt Alex
Juli - Perfekte Welle
Pleymo - New Wave
Les Wampas - Manu Chao
Janie Hendrix, in an interview with the Los Angeles Times, revealed that she has let Jimi Hendrix's works to be used for a Rock Band game to be released later in 2010; Harmonix later clarified that this content is not for dedicated standalone game. It was revealed in March 2010 that Harmonix and MTV Games had reached an exclusive licensing agreement to release several albums for the Rock Band series, starting with Axis: Bold as Love in late March 2010, in conjunction with re-released remasters of these albums by the label, Experience Hendrix. There is also an option for Harmonix to utilize a Hendrix avatar within the series, leaving open the possibility of a Hendrix-centric title